Simulation of RF Thermionic Gun

Tang Chuanxiang; Yang Yue; Lin Yuzheng

Chinese Physics C> 1996, Vol. 20> Issue(4) : 376-384

Simulation of RF Thermionic Gun

Department of Engineering Physics,Tsinghua University,Beijing 100084

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Abstract：
The beam dynamics in RF thermionic guns is studied using simulation method in this paper.A RF thermionic gun simulation code is compiled.It is a versatile multiparticle trace code,besides use for RF thermionic guns,capable of simulations of photocathode RF guns and standing wave accelerators.During our simulation,the Schottky effect and beam load effect are calculated using iterative method, and space charge effect is treated at every time step by splitting the electron bunch into discs of variable radii and considering the mirror effect of the cathode surface.The dynamics calculations are done in a rectangular coordinate system(x, y, z),so that dis-axisymmetrical fields, such as the quadrupole components of RF fields of the coupling slots, can be taken into account.Our simulation results have been compared with those of PARMELA and experiments of BFEL laboratory,showing very good agreement with each other.

References

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G.A.Westensknow,J.M.J Madey,Laser and Particle Beams,2（1984）223.[2]J.S.Fraser,R.L.Sheffield,IEEE Trans.on Nucl.Sc.,NS-32（1985）1791.[3]K.J.Kim,NIM,A275（1985）201.[4]J.Gao,NIM,A304（1991）345.[5]C.Travier,NIM,A340（1994）28.[6]唐传祥、林郁正，用于北京自由电子激光的多腔热阴极微波电子枪的设计与研究，清华大学加速器教研组，内部报告（1994）.[7]B.Mouton,PARMELA,February,6,1989[8]宋燠，强激光与粒子束，3（1991）109.[9]CAV,清华大学加速器教研组，内部资料（1993）.[10]CAV9,清华大学加速器教研组，内部资料（1993）.[11]K.HALBACH,R.F.HOLSINGER,Particle Accelerators,7（1976）213.[12]谢羲等，原子能科学技术，2（1978）127.[13]H.Liu,NIM,A294（1990）365.[14]王钢等，中国科学院高能物理研究所自由电子激光室，私人通信（1995）.

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[19]	HUANG Yong-Zhang , TENG Ke-Jian , XIE Jia-Lin . Design and Fabrication of Alpha Magnet for an Microwave Electron Gun. Chinese Physics C, 1993, 17(9): 790-795.
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Tang Chuanxiang, Yang Yue and Lin Yuzheng. Simulation of RF Thermionic Gun[J]. Chinese Physics C, 1996, 20(4): 376-384.

Tang Chuanxiang, Yang Yue and Lin Yuzheng. Simulation of RF Thermionic Gun[J]. Chinese Physics C, 1996, 20(4): 376-384. shu

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Received: 1900-01-01
Revised: 1900-01-01

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Simulation of RF Thermionic Gun

Corresponding author: Tang Chuanxiang,

Department of Engineering Physics,Tsinghua University,Beijing 100084

Received Date: 1900-01-01

Accepted Date: 1900-01-01

Available Online: 1996-04-05

Abstract: The beam dynamics in RF thermionic guns is studied using simulation method in this paper.A RF thermionic gun simulation code is compiled.It is a versatile multiparticle trace code,besides use for RF thermionic guns,capable of simulations of photocathode RF guns and standing wave accelerators.During our simulation,the Schottky effect and beam load effect are calculated using iterative method, and space charge effect is treated at every time step by splitting the electron bunch into discs of variable radii and considering the mirror effect of the cathode surface.The dynamics calculations are done in a rectangular coordinate system(x, y, z),so that dis-axisymmetrical fields, such as the quadrupole components of RF fields of the coupling slots, can be taken into account.Our simulation results have been compared with those of PARMELA and experiments of BFEL laboratory,showing very good agreement with each other.

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Simulation of RF Thermionic Gun

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